Q. For the function f(x)=4x−93+x, find f−1(x).Answer: f−1(x)=
Replace with y: To find the inverse function, f−1(x), we need to switch the roles of x and y in the original function and then solve for y. Let's start by replacing f(x) with y for clarity.y=4x−93+x
Switch x and y: Now, switch x and y to find the inverse function.x=4y−93+y
Multiply by (4y−9): Next, we need to solve for y. To do this, we'll multiply both sides of the equation by (4y−9) to get rid of the fraction.x⋅(4y−9)=3+y
Distribute x: Distribute x on the left side of the equation.4xy−9x=3+y
Move y to left: Now, we want to get all the terms with y on one side and the constants on the other. Let's move y to the left side by subtracting y from both sides.4xy−y−9x=3
Factor out y: Factor out y on the left side of the equation.y(4x−1)=3+9x
Divide by (4x−1): Now, divide both sides by (4x−1) to solve for y.y=4x−13+9x
Inverse function found: We have found the inverse function. Therefore, f−1(x) is:f−1(x)=4x−13+9x
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